APA Style

Welk, G, , J. et al (2004). Concepts of Physical Fitness Active Lifestyles for Wellness (12th ed.). Boston: McGraw Hill HIigher Education.

MLA Style

Welk, Gregory, , J.. et al. "Concepts of Physical Fitness Active Lifestyles for Wellness". 12th ed. Boston: McGraw Hill HIigher Education, 2004. Text.